Very perceptive on tbw2’s part. Never occurred to me. Of course. This is the way to kill cash without laws.
If you see cash only businesses see all their cash seized, it pushes people into accepting debit or credit much more. Cash only businesses that then operate under the radar must then either NEVER deposit cash, putting them at risk of seizure by cops who see the cash when stopping them (same civil forfeiture abuse Institute for Justice is fighting) or be so small that it never garners attention, like the guy who sells ice cream from a push cart and uses the money to pay for groceries that week.